Build a Bridge

There’s a purple Damage Amp power-up sitting on an unreachable island in the LevelTutorialMap, and you will build a bridge and path so that the player can reach it.

In this step, you use geometry tools to place an additive BSP cube to make the bridge spanning the gap. Then you will use a subtractive BSP cube to cut a path for the player.

To learn more about translating, rotating, and scaling...

Video 3: Adding geometry to create a bridge.

Navigate the view to the missing bridge. It is marked by hazard stripes.
Under the Place mode tab (upper left corner) select the BSP subtab
Drag a Box from the BSP subtab onto one of the hazard stripes. This creates an additive BSP Brush, which adds geometry to the world.
The next step is to move the box (BSP Brush) into position to start bridging the gap. You do this by pressing W to switch to the translation gizmo; drag the arrows on the cube to move it around in your map until it is lined up against the hazard stripes.
As the BSP Brush (box) is not wide enough, you’ll need to stretch it to create a wider box. Switch into Geometry Editing Mode by selecting the trimmed box icon from the Modes window or by pressing SHIFT + 5. You will notice the Modes panel change when you are in Geometry editing mode. Selected BSP shapes are blue when their geometry is being edited.
In Geometry Editing Mode, selecting a BSP surface highlights the surface in orange. The transform gizmo will appear in the center of the selected (orange) surface. Left clicking and dragging a specific axis (it turns yellow), allows you to resize the cube surface larger or smaller along that axis.
Reshape the cube until it makes for an appropriate bridge.
Notice that the BSP box is a transparent blue. To commit the changes you have made, find the Build → Build Geometry (Current Level) on the toolbar. The default shortcut is Ctrl+Shift+B. Note: the build process may report errors that are not serious.

You should now see a solid bridge where there was once a gap between hazard stripes.

Fixing Mistakes

In the creative modding process, you will want to delete and correct ideas that didn't work. Quick ways to fix mistakes include:

UNDO by pressing CTRL+Z. UNDO can require a Build Geometry (shortcut: CRTL+SHT+B) instruction to update the level and see the action has been reversed.
DELETE by selecting a BSP Brush and hitting delete will delete the BSP Brush. To see the object removed requires you to Build Geometry afterwards to update the level.
To completely start over, simply reload the tutorial map and begin anew.

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